51 BRIDGE ROAD EAST WELWYN GARDEN CITY ECOLOGICAL …
Transcript of 51 BRIDGE ROAD EAST WELWYN GARDEN CITY ECOLOGICAL …
51 BRIDGE ROAD EAST
WELWYN GARDEN CITY
ECOLOGICAL METHOD
STATEMENT
Written By: LG
Checked By: NJ
Date: 07/08/2018
Document File Ref: TWNT20946_EMS
Revision: A – 06.11.18
CONTENTS
1.0 INTRODUCTION AND CONTEXT 1
2.0 SITE CLEARANCE AND DEMOLITION 3
3.0 PROTECTION/ AVOIDANCE MEASURES DURING CONSTRUCTION 7
4.0 TIMETABLE FOR IMPLEMENTATION – DEMOLITION/ CLEARANCE 9
5.0 PERSONS RESPONSIBLE 10
6.0 MANAGEMENT AND MAINTENANCE 11
7.0 ECOLOGICAL ENHANCEMENTS 16
APPENDIX 1 TREE PROTECTION PLAN
APPENDIX 2 SOFT LANDSCAPE AND ECOLOGICAL ENHANCEMENTS PLAN
Ecological Method Statement 51 BRIDGE ROAD EAST, WELWYN GARDEN CITY
ACD Environmental 1
1.0 INTRODUCTION AND CONTEXT
1.1 This Ecological Method Statement (EMS) has been written to satisfy Condition 5 of
the planning permission (6/2017/2104/MAJ, Welwyn Hatfield Borough Council) for
the approved development as follows:
“No development shall take place (including any demolition, ground works, site
clearance) until a method statement for all recommendations listed with the
[Ecological Impact Assessment (ACD Environmental, August 2017)] has been
submitted to and approved in writing by the local planning authority.
The content of the method statement shall include the:
a) purpose and objectives for the proposed works;
b) detailed design(s) and/or working method(s) necessary to achieve stated
objectives (including, where relevant, type and source of materials to be used);
c) extent and location of proposed works shown on appropriate scale maps and
plans;
d) timetable for implementation, demonstrating that works are aligned with the
proposed phasing of construction;
e) persons responsible for implementing the works;
f) initial aftercare and long-term maintenance (where relevant);
g) disposal of any wastes arising from works.
The works shall be carried out strictly in accordance with the approved details and
shall be retained in that manner thereafter.
REASON: To protect ecology in accordance with NPPF 2012, and Policy R11 of the
Local Plan 2005”
1.2 The site comprises a brownfield site containing a large office building surrounded
by a hardstanding car park. There are margins of improved grassland and semi
mature trees around the site perimeter and small areas of introduced scrub and
improved grassland within the car park.
Ecological Method Statement 51 BRIDGE ROAD EAST, WELWYN GARDEN CITY
ACD Environmental 2
Sensitive Ecological Features
1.3 The sensitive ecological features at the site are summarised as follows:
Bats - a single common pipistrelle Pipistrellus pipistrellus bat was recorded
emerging from the south eastern elevation of the building from behind
concrete cladding near the top of the building on two occasions in May and
June 2017. The site is being registered under the Bat Low Impact Class
Licence (BLICL) prior to demolition;
Nesting Birds - potential for birds to nest on the flat roof of the building, in the
plant room and in vegetation throughout the site; and
Trees - oak Quercus robur, wild cherry Prunus avium, Norway maple Acer
platanoides, sycamore A. pseudoplatanus, whitebeam Sorbus aria, lime Tilia
sp., crack willow Salix fragilis and silver birch Betula pendula are present
within the grassland margins, which form the southern, western and part of
the eastern and northern boundaries.
Purpose and Objectives
1.4 The purpose of this method statement is to protect ecology in accordance with the
National Planning Policy Framework (NPPF) 20181, and Policy R11 of the Welwyn
Hatfield District Local Plan 2005.
1.5 This method statement gives site contractors details of the measures that must be
taken to avoid breaching wildlife legislation.
1 https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/728643/Revised_NPPF_2018.pdf
Ecological Method Statement 51 BRIDGE ROAD EAST, WELWYN GARDEN CITY
ACD Environmental 3
2.0 SITE CLEARANCE AND DEMOLITION
Building Demolition
2.1 The Application Site will be registered under the BLICL and the area of the building
that has been used by a bat will be demolished legally in November 2018. This
timescale is not in line with the recommendations contained within the EcIA Report,
as the construction programme has been pushed back. However, demolition can
still proceed as per the methodology detailed below.
2.2 To avoid the very low potential for impacting torpid bats, demolition will take place
only when overnight temperatures are above 5oC. The feature that has been used
by a bat will be thoroughly checked with an endoscope by the BLICL Registered
Consultant or an Accredited Agent, immediately prior to demolition. A cherry picker
or similar will be used to access the feature from the outside. If at this stage a bat is
found to be present, if possible, it will be extracted by hand and placed in a bat box,
which will be erected on a tree within the Application Site. Alternatively, the ecologist
will wait until the bat has emerged and the feature will be made inaccessible to bats.
The exact methodology will be decided on and implemented by the BLICL registered
ecologist. Once a bat is confirmed not to be present, the concrete slab will be
removed on the same day or rendered inaccessible to bats in the intervening time
to demolition.
Photograph 1: Bat emergence location on south eastern elevation of building.
Ecological Method Statement 51 BRIDGE ROAD EAST, WELWYN GARDEN CITY
ACD Environmental 4
2.3 The loss of bat roosting features within the Application Site will be compensated for
through the provision of a Schwegler 2F bat box, which will be available for the
BLICL Registered Consultant to move a bat into, if and when required during
demolition. The box will be erected on a retained tree. Two Habibat bat boxes will
be integrated into the fabric of the new buildings. These bat boxes will be installed
on south-east/west facing elevations of the buildings, over 4m in height and out of
all direct artificial light. The boxes should be positioned close to dark corridors and
areas of open space to provide safe flight lines for bats to access the boxes.
Grassland
2.4 Small areas of the grassland around the Application Site are going to be impacted
by construction traffic.
2.5 The grass banks around the building are being retained. These banks have an
abundance of rabbit Oryctolagus cuniculus holes, which will not be directly impacted
by the ground works on site. Rabbits are protected from cruelty under the Animal
Welfare Act 2006 and the Wild Mammals Protection Act 1996 and are also protected
under sections of the WCA 1981 (as amended), namely under sections relating to
protection of other animals and prevention of poaching. If works are likely to impact
these holes, any rabbits that may be present must be dealt with humanely, i.e. slowly
removing topsoil so the rabbits have time to move into surrounding areas.
2.6 There is very low potential to impact small numbers of common amphibian species
that might be present within the grassland. During clearance of any grassland, soil
stripping should proceed slowly using a phased approach to give amphibians time
to move into surrounding habitats.
2.7 There is very low potential for small numbers of reptiles to be present within the
areas of longer, tussocky grassland around the perimeter of the site. The majority
of these areas are being retained; however, small areas may need to be cleared.
When minor clearance is required, the grass should be cut when reptiles are likely
to be fully active i.e. between April - September period, to make the areas unsuitable
for reptiles. Cutting should be undertaken in a phased way over two consecutive
days to a height of no less that 200mm as the first cut and 100mm at the second
cut. Following the removal of taller vegetation, the grass should be maintained at a
Ecological Method Statement 51 BRIDGE ROAD EAST, WELWYN GARDEN CITY
ACD Environmental 5
height of 100mm through regular mowing or strimming to discourage reptiles from
returning.
2.8 Much of the existing grassland around the perimeter of the site will be retained and
enhanced with species rich amenity grass seed. Areas of grassland that need to be
cleared will be replaced with good quality amenity grass turves laid in line with good
horticultural practices.
2.9 The stripping, storage and re-use of top soil shall be carried out in accordance with
BS 4428:1989 and BS 3882:2007. Additional guidance is provided by Defra in its
‘Construction Code of Practice for the Sustainable Use of Soils on Construction
Sites2’.
Tree/ Scrub Clearance
2.10 The majority of the existing semi mature trees are being retained and protected from
the development. Two category C trees are proposed for removal to make room for
a pedestrian footpath. Root Protection Zones (RPZs) will be established around all
of the retained trees prior to the start of works and fencing will be used to protect
them from construction traffic.
2.11 To ensure damage does not occur to trees highlighted for retention, tree protection
fencing must be erected before any plant/vehicles entering the site whatsoever. This
should be subject to a pre-commencement site meeting between the developer and
the project arboriculturist. Full details of the tree protection are shown on the Tree
Protection Plan (ACD Environmental ref: TWNT20946-03A) in Appendix 1.
2.12 The trees will be retained as part of a grassland/ tree matrix around the perimeter
of the development, which will be sensitively managed for wildlife.
2.13 The clearance of trees and scrub should be undertaken outside the bird nesting
season (generally taken to be March to August inclusive). If vegetation removal must
be undertaken during the bird nesting, the area must be checked in advance by an
ecologist for the presence of nesting birds. If there is no evidence of nesting birds,
2 https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/716510/pb13298-code-of-practice-090910.pdf
Ecological Method Statement 51 BRIDGE ROAD EAST, WELWYN GARDEN CITY
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the clearance work must be completed within 48 hours of inspection. If any active
nests are identified, vegetation clearance must cease and an appropriate buffer
zone (usually approximately 5m) must remain until it has been confirmed that the
young have fledged and the nest is no longer in use.
2.14 The majority of the introduced scrub within the car park will be removed. As the
diversity of species is low and comprises mainly of ornamental, non-native species
their loss will be mitigated for by the inclusion of areas of wildlife friendly planting
within the development. Species such as heather Calluna vulgaris and bell heather
Erica cinerea should be used within flower beds within the site to enhance the site
for pollinators. Holly Ilex aquifolium, guelder rose Viburnum opulus, lavender
Lavandula sp., and apple blossom Malus sp. are recommended to be used within
the development to increase the amount of fruit and nectar bearing plant species
within the site for birds and bees in particular.
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ACD Environmental 7
3.0 PROTECTION/ AVOIDANCE MEASURES DURING CONSTRUCTION
3.1 Good practice activities should be adopted during the construction phase. These
include:
Temporary lighting during the construction phase will be minimised to task
related lighting only and where feasible, works will be undertaken during
normal working daylight hours to prevent the need for lighting. No artificial
lighting will be left on at the site outside of working hours;
Where security lighting is required it is recommended that it is motion sensitive
with hooded luminaires and directed away from the vegetated boundaries;
If the schedule of works are to be amended to include the use of lighting not in
line with the recommended security lighting above, the Ecological Clerk of
Works (ECoW) will be consulted prior to installing lighting on site. Where
proposed lighting provisions are deemed unsuitable from an ecological
perspective the ECoW will work alongside the lighting engineer for the
provision of alternative lighting solutions;
Trenches will be covered at the end of the working day;
Any temporary pipes will be capped to prevent animals gaining access during
the night; and
If any signs of badger Meles meles sett excavation are encountered on site at
any time during demolition or construction, the advice of an ecologist should
be sought.
3.2 Pollution prevention guidance notes and publications produced previously by the
Environment Agency are currently subject to review in an attempt by the government
to simplify and streamline the guidance provided. Pollution Prevention Guidelines
(PPGs)3 are currently archived on the National Archives website and represent the
most up-to-date good practice guidance notes.
3
http://webarchive.nationalarchives.gov.uk/20140328090931/http://www.environmentagency.gov.uk/business/topics/pollution/39083.aspx
Ecological Method Statement 51 BRIDGE ROAD EAST, WELWYN GARDEN CITY
ACD Environmental 8
3.3 Therefore, measures to prevent pollution incidents will follow the recommendations
set out in the Environment Agency’s PPGs. It will be the responsibility of the site
manager to ensure that any site contractors are aware of the measures to be
implemented to prevent and deal with any pollution incidents.
3.4 The site should be adequately protected by secure perimeter fencing with a
padlocked front gate to reduce the potential incidents attributed to vandalism and
theft. In addition, emergency out of hours contact numbers should be clearly
displayed at the site entrance.
3.5 It will be the responsibility of the site manager to ensure that:
i) All fuel and chemical storage is sited on an impervious base within a secured
impervious bund;
ii) Refuelling of mobile vehicles is undertaken in a designated area, on an
impermeable surface and away from any drains or watercourses;
iii) Diesel pumps or similar equipment are placed on drip trays to collect any
minor spillages; and
iv) Drip trays are checked at least weekly and any accumulated oil removed for
disposal.
3.6 It will be the responsibility of the site manager to ensure that all wheel washes and
plant washing facilities used are securely constructed with no overflow and the
effluent is contained for proper treatment and disposal. The site contractor will also
be responsible for ensuring that all site roads are regularly brushed or scraped and
kept free from dust and mud deposits. In dry weather dust suppression measures
will be used.
Ecological Method Statement 51 BRIDGE ROAD EAST, WELWYN GARDEN CITY
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4.0 TIMETABLE FOR IMPLEMENTATION - DEMOLITION/ CLEARANCE
Optimal
Sub-optimal – additional precautions required
Unsuitable
Table 1: Ecological constraints to demolition/ vegetation clearance.
Au
g
Se
p
Oc
t
No
v
Dec
Ja
n
Fe
b
Ma
r
Ap
r
Ma
y
Ju
n
Ju
l
Demolition
of
Building
BLICL would require modification
No demolition BLICL would require modification
Clearance
of trees
and scrub
Requires check by ecologist for nesting birds before clearance
Clearance
of
grassland
Grass to be cleared should be made unsuitable for reptiles in April - Sept
Ecological Method Statement 51 BRIDGE ROAD EAST, WELWYN GARDEN CITY
ACD Environmental 10
5.0 PERSONS RESPONSIBLE
5.1 At the time of writing, it is anticipated that the following parties will be responsible
for implementing the EMS.
5.2 The developer and their appointed principal site contractor will be responsible for:
a) Compliance with legal consents relating to nature conservation;
b) Compliance with planning conditions relating to nature conservation;
c) Installation of physical protection measures during construction
d) Implementation of sensitive working practices during construction; and
e) Regular inspection and maintenance of physical protection measures and
monitoring of working practices during construction.
5.3 Contact Details
Developer: Taylor Wimpey North Thames
Principal Contractor: ………………………………………
Details to be confirmed upon appointment.
Ecological Clerk of Works
5.4 The appointed ECoW will be responsible for provision of training and information to
all construction personnel on site about the importance of 'Ecological Protection
Zones'. The ECoW will also supervise relevant pre-construction works as required,
including vegetation/site clearance, reptile mitigation as per the relevant reptile
mitigation method statement, to ensure no harm to legally protected species occurs.
Ecological Method Statement 51 BRIDGE ROAD EAST, WELWYN GARDEN CITY
ACD Environmental 11
6.0 MANAGEMENT AND MAINTENANCE
6.1 Following installation and after transfer the landscape shall be the responsibility of
and maintained in perpetuity by:
Domestic Owners; and
Taylor Wimpey and their appointed Management Companies (should these
be contracted out).
6.2 Refer to ACD drawing; TWNT20946 Soft Landscape Proposals in Appendix 2 for
planting and grassland locations.
6.3 The Developer shall ensure that any landscape contractor employed by the
developer shall carry out the periodic maintenance of all planted areas, other than
any areas for which the appointed Management Company becomes responsible
during the said Maintenance Period. Inspection checks shall be carried out at
monthly intervals and the appropriate work carried out.
6.4 The Developer shall ensure that any landscape contractor employed by the
developer shall carry out in all areas any shrub, tree, grass and other plants
replacements that may be necessary until transfer of responsibility to the
Management Company.
6.5 The Management Company shall be responsible for all periodic maintenance and
replacement thereafter for all planted areas to which its management agreement
relates, and shall ensure that any landscape contractor employed by it carries out
periodic maintenance of all such areas in accordance with the general horticultural
schedules below. Either inspection checks shall be carried out by a competent
person, a member of British Association of Landscape Industries (BALI) or the
Landscape Institute (LI), acting for the Management Company, at minimum monthly
intervals and the appropriate work carried out.
Trees
6.6 All works should be undertaken in accordance with the British Standard
BS3998:2010 Tree Work Recommendations, by recognised tree contracting
companies from the Arboricultural Association's list of registered contractors. Proof
Ecological Method Statement 51 BRIDGE ROAD EAST, WELWYN GARDEN CITY
ACD Environmental 12
of experience and insurance provision will be required. All work shall be undertaken
at the appropriate time and with the consent of the Management Company.
6.7 The Arboricultural Impact Assessment and Method Statement produced by ACD
Environmental Ltd (Ref: TWNT20946_AIA_RevC) will be followed. All operations
will be carefully carried out to avoid damage to the trees being treated, or
neighbouring trees. No trees to be retained shall be used for anchorage or winching
purposes.
6.8 The trees should be checked annually for signs of deterioration or distress and the
appropriate actions taken, where a potential safety hazard is identified.
6.9 Norway maple Acer platanoides is considered invasive in the absence of
management, therefore if seedlings and saplings are found within areas of
grassland, they should be pulled out by hand.
Grass
6.10 Areas directly to the front and flat areas of rear gardens to the new properties will
be laid to an amenity grade turf. This is due to the potential for heavy use by the
new occupants.
6.11 Grass shall be cut during the growing season (generally April - October) using a
sharp cutter to leave about 30-35mm of growth and remove arisings from site.
6.12 Grass will be cut at intervals of not more than 10-14 days depending on growing
conditions. Arisings shall be collected and removed from site. A dressing of
prepared fine fishmeal shall be applied at the rate of 60gms/m squared after the
second mowing and the arisings of the cut following are to be allowed to fly.
6.13 Grassed edges to planted areas to be trimmed to maintain a clear smooth edge to
planted beds; strim edges elsewhere but not against trees; spike annually in
October.
6.14 Should bare patches of grass develop, area is to be cultivated to 150mm and then
seeded with amenity grass seed. To be cross-sown in two directions at right angles
to each other (half the seed being used in each direction) at the rate of 35 gm per
square meter and the ground lightly raked over on a still dry day when the top 25mm
Ecological Method Statement 51 BRIDGE ROAD EAST, WELWYN GARDEN CITY
ACD Environmental 13
of soil is dry.
6.15 Grassland to receive different maintenance regimes. Refer to ACD Environmental
Ltd Soft Landscape proposals for grassland mix locations. Wear and Tear amenity
grass seed mix A24 to be maintained as amenity grassland and cut at 10-14 day
intervals.
General
Grassed areas beyond the boundaries of domestic ownership will be maintained
in perpetuity by the Management Company.
Weekly
All plants shall be watered following 10 days without rain. Then weekly until
natural rainfall during June - August.
Fortnightly
Amenity Grass to be cut every 10-14 days.
Fortnightly litter pick over the entire site within areas covered by the Management
Company.
Monthly
Weed control shall be allowed for at monthly intervals. All areas to be weeded by
hand.
All plants shall be inspected monthly for wind firmness and firmed as necessary
at the same time. Stakes shall likewise be checked for firmness and tree ties
checked.
Bi-Annual
The bark mulch should be topped up bi-annually.
Grass cutting to Wildflower areas.
After two years tree stakes and ties are usually ready to be removed.
Ecological Method Statement 51 BRIDGE ROAD EAST, WELWYN GARDEN CITY
ACD Environmental 14
Annual
Replacement of any failed trees or shrubs will be allowed for annually to ensure
that the planting areas are fully stocked at all times.
Any hollows which appear due to settlement shall be top dressed annually, early
in the growing season.
Minor pruning of dead or damaged wood shall be allowed for annually.
All planted areas and trees shall be given an application of an approved top
dressing in May. Not in Wildflower areas.
Shrubs shall be maintained in a balanced shape and prevented from obscuring
signs, windows and encroaching on paths.
Every 5 Years
A suitably qualified person employed by the Management Company to undertake
a review of the condition, success and long-term maintenance of the planting.
Any amendments to the landscape management plan required to ensure a good
planting scheme should be submitted to the LPA for approval. The LPA may draw
the managing company’s attention to defects in the maintenance or failure to
comply with the landscape management plan and require that the Management
Company rectify these defects or apply for a variation to the landscape
management plan.
Ecological Method Statement 51 BRIDGE ROAD EAST, WELWYN GARDEN CITY
ACD Environmental 15
Table 2: Implementation checklist
Task When Tick when completed
Notes Name Date Sign
Grass seeding
March - May 2020
Tree planting November- March 2019
Not in waterlogged ground
Not in drought conditions
Not in frost
Shrub planting
April 2020 - August 2020
Bird and bat box installation
Tree boxes during construction
Building boxes as dwellings are built, prior to occupation
Hedgehog
Erinaceus europaeus -friendly fence installation
As dwellings are built
Ecological Method Statement 51 BRIDGE ROAD EAST, WELWYN GARDEN CITY
ACD Environmental 16
7.0 ECOLOGICAL ENHANCEMENTS
7.1 The NPPF states that plans should ‘minimise impacts on and provide net gains for
biodiversity’4. The following enhancements will be installed within the site prior to
occupation. Locations of artificial habitats are shown in Appendix 2.
7.2 The Application Site will be enhanced for breeding birds by the provision of bird
boxes within the development. At least five bird boxes will be erected on trees and
buildings in north to north-easterly elevations at a height of 2-5m above ground level.
Recommended bird boxes include: 2 x 3S Schwegler Starling Nest Boxes, 2 x 1SP
Schwegler Sparrow Terrace and 1 x 2H Schwegler Robin Box.
7.3 Two HH7 Hogilo Hedgehog boxes will be provided within boundary habitats. The
boxes will be located within cover, close to vegetation and out of the prevailing wind.
7.4 Fences will include features to allow the movement of wildlife between gardens by
either raising close board fencing above the ground or by cutting small holes cut in
the fencing gravel boards allowing continued access for small wildlife such as
hedgehogs.
4 https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/728643/Revised_NPPF_2018.pdf
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Tree protection limited
to extent of existing
soft landscape
Crown reduce T21:
retain spread of 3.5m
and height of 7m
T1 - B1
Common Oak
T2 - B1
Common Oak
T3 - C1
Wild Cherry
T4 - C1
Norway Maple
T5 - C1
Oriental Plane
T6 - C1
Whitebeam
T7 - B1
Swedish Whitebeam
T8 - B1
Swedish Whitebeam
T9 - C1
Wild Cherry
T10 - B1
Sycamore
T11 - C1
Wild Cherry
T12 - B1
Lime
T13 - B1
Lime
T14 - B1
Lime
T15 - C1
Lime
T16 - B1
Wild Cherry
G17 - U
Crack Willow, Silver Birch
T18 - C1
Whitebeam
T19 - B1
Sycamore
T20 - B1
Norway Maple
T21 - B1
Norway Maple
T22 - C1
Hornbeam
Poor quality self-seeded
boundary vegetation. No
protection required
1
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NEIGHBOURING NORTON BUILDING
BORDERING THE NORTH EAST BOUNDARY
E
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61 BRIDGE ROAD EAST
(ISABEL HOSPICE)
1
8
m
SS
Communal green amenity
spaces - 662m²
B
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BLOCK A
(3-storeys)
Green amenity
space - 108m²
BLOCK C
(4-storeys)
BLOCK D
(3-storeys)
BLOCK B
(4-storeys)
VEHICLE REPAIR
CENTRE
P
e
d
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s
t
r
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a
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A
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s
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Green amenity
space - 218m²
(not incl banking)
Green buffer /
defensible space
E
n
t
r
yG
a
t
e
Communal green
amenity spaces -
85m²
Pedestrian
Access
1.8m close
boarded fencing
1.8m close
boarded fencing
1.8m close
boarded fencing
B
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Date Details Drawn
drawn: checked:dwg no:
scale:
drawing:date:
scheme:
May 2017
AJB
51 Bridge Road East,Welwyn Garden City
Tree Protection Plan
1:200@A1
MW
Rev
client: Taylor Wimpey
AC
D
Copyright of ACD. All rights described in Chapter IV of the Copyright, Designs andPatents Act 1988 have been generally asserted: 2015. Copyright of this plan remains
with ACD until all fees have been paid in full.
The original of this drawing was
produced in colour- a monochrome
copy should not be relied upon.
TWNT20946-03A
0 1 2 3 4 5 10m
TREE TO BE REMOVED
ROOT PROTECTION AREA (RPA) FOR RETAINED TREES
A CATEGORY TREE
B CATEGORY TREE
C CATEGORY TREE
U CATEGORY TREE
INDICATIVE SERVICE ROUTE AVOIDING PROTECTION AREAS
EXISTING SITE FEATURES
Foot traffic Scaffolding
Protective
fencing
Ground undisturbed and protected by geotextile
fabric , woodchip and side-butting scaffold boards
Protected
area
Platform level
at first lift of
brickwork
Protected
area
Protective
fencing
For pedestrian movements only, a single thickness of scaffold boards should be placed either
on top of a driven scaffold frame, so as to form a suspended walkway, or on top of a
compression-resistant layer (e.g. 100 mm depth of woodchip), laid onto a geotextile.
For pedestrian operated plant up to a gross weight of 2 t, proprietary, inter-linked ground
protection boards should be placed on top of a compression-resistant layer (e.g. 150 mm depth
of woodchip), laid onto a geotextile.
For wheeled or tracked construction traffic exceeding 2 t gross weight, an alternative system
(e.g. pre-cast reinforced concrete slabs) should be employed to an engineering specification
designed in conjunction with arboricultural advice to accommodate the likely loading to which it
will be subjected.
CONSTRUCTION EXCLUSION ZONE
Root protection areas (RPA) of retained trees within which all construction activity is restricted.
All trees that are being retained on site must be protected by barriers and/or ground protection
before any materials or machinery are brought onto the site, and before any demolition,
development or stripping of soil commences. Where all activity can be excluded from the RPA,
vertical barriers must be erected to create a construction exclusion zone. Where, due to site
constraints, construction activity cannot be fully or permanently excluded in this manner from all
or part of a tree’s RPA, appropriate ground protection can be installed.
DEFAULT POSITION FOR THE TREE PROTECTION BARRIERS.
BS5837:2012 Figure 2- barrier specification
GROUND PROTECTION
Where the set-back of the tree protection barrier would expose unmade ground to construction
damage, new temporary ground protection should be installed as part of the implementation of
physical tree protection measures prior to work starting on site.
Examples of alternative barrier designs can be found in the method statement. Should an
alternative design be more viable and appropriate, it must be agreed with the project
arboriculturist before its implementation.
1 Standard scaffold poles
2 Heavy gauge 2m tall galvanized tube and weld mesh infill panels
3 Panels secured to uprights and cross-members with wire ties
4 Ground level
5 Uprights driven into the ground until secure (minimum depth 0.6m)
6 Standard scaffold clamps
5
4
6
3
1
2 m
3 m
4
4
4
6
6
6
RESTRICTIONS WITHIN TREE PROTECTION AREAS
Inside the exclusion area of the fencing, the following shall apply:
· No mechanical excavation whatsoever
· No excavation by any other means without
arboricultural site supervision
· No hand digging without a written method statement
having first been approved by the project
arboriculturist.
· No lowering of levels for any purpose (except
removal of grass sward using hand tools)
· No storage of plant or materials
· No storage or handling of any chemical including
cement washings
· No vehicular access
· No fire lighting
In addition to the above, further precautions are necessary
adjacent to trees:
· No substances injurious to tree health, including
fuels, oil, bitumen, cement (including cement
washings), builders sand, concrete mixing and other
chemicals shall be stored or used within or directly
adjacent to the protection areas of retained trees
· No fire shall be lit such that flames come within 5m
of tree foliage.
WHY TREE PROTECTION IS NEEDED
1) Soil compaction kills roots- caused by plant
movement and storage of materials within
protected areas.
2) Trenching severs roots- many small roots
grow within the top 600mm of soil. Even the
removal of the top 200mm can cause damage.
3) Soil pollution kills roots- Dripping fuel storage
or cement washings can contaminate the soil
resulting in root death.
4) Raising & lowering levels kills roots- the soil
used to increase levels can compact the
underlying soil (see point 1). Lowering levels will
remove roots causing damage to the tree.
5) Bark and branch damage- bark removal and
branch damage can allow disease and fungi into
the tree.
The impact of any of the above can take years
to show- trees can have huge reserves of food
and water.
WimpeyTaylor
16.01.2018 Revised layout MWA
NO-DIG SURFACE
Cellular confinement system (CCS) to be used to create this area of hard
surface, above the existing ground level. Topsoil to be retained. Depth of
CCS to be 50-75mm for pedestrian surfaces and 100-200 for vehicular
surfaces. Surface to be porous to approved details and specifications. To
be installed under arboricultural supervision. All specifications subject
to engineering design.
Original ground
level level
Peg and board edging
Top soil to
BS3882:2007
Depressions
and soft spots in
formation to be
filled with sharp
sand to levels
required
Porous surface to finish
TreeTex T300 non-woven geotextile or
similar approved laid over formation
CCS/Cellular
confinement system
(Geosynthetics CellWeb
or similar approved)
Cells to be filled with 20-40mm clean graded angular
stone to manufacturers details and specifications
TreeTex T300 geotextile or similar laid over CellWeb
109No Buxus sempervirens 'Rotundifolia'
87No Ligustrum ovalifolium
5No Chaenomeles superba
6No Aucuba japonica 'Rozannie'
4No Lavandula angustifolia 'Hidcote'
4No Sarcococca humilis
6No Euonymus fortunei 'Emerald Gaiety'
10No Skimmia japonica 'Rubella'
5No Choisya 'Aztec Pearl'
9No Hebe albicans 'Red Edge'
9No Hebe albicans 'Red Edge'
11No Lavandula angustifolia 'Hidcote'
20No Elaeagnus ebbingei
6No Sarcococca humilis
5No Chaenomeles superba
14No Genista lydia
15No Sarcococca humilis
7No Lavandula angustifolia 'Hidcote'
4No Choisya 'Aztec Pearl'
5No Euonymus fortunei 'Emerald Gaiety'
6No Philadelphus 'Belle Etoile'
8No Philadelphus 'Belle Etoile'
11No Chaenomeles superba
9No Elaeagnus ebbingei
11No Philadelphus 'Belle Etoile'
7No Lavandula angustifolia 'Hidcote'
15No Skimmia japonica 'Rubella'
13No Aucuba japonica 'Rozannie'
12No Genista lydia
12NoFuchsia 'Margaret'
10No Hebe albicans 'Red Edge'
15No Viburnum burkwoodii 'Anne Russell'
11No Philadelphus 'Belle Etoile'
10No Euonymus fortunei 'Emerald Gaiety'
9No Skimmia japonica 'Rubella'
9No Choisya 'Aztec Pearl'
20No Euonymus fortunei 'Emerald Gaiety'
14No Sarcococca humilis
12No Philadelphus 'Belle Etoile'
10No Euonymus fortunei 'Emerald Gaiety'
21No Chaenomeles superba
20No Genista lydia
4No Sarcococca humilis
16No Sarcococca humilis
10No Philadelphus 'Belle Etoile'
74No Buxus sempervirens 'Rotundifolia'
74No Buxus sempervirens 'Rotundifolia'
16No Photinia fraseri 'Little Red Robin'
11No Hebe albicans 'Red Edge'
11No Escallonia 'Apple Blossom'
19No Philadelphus 'Belle Etoile'
173No Ligustrum ovalifolium
198No Carpinus betulus
5No Elaeagnus ebbingei
10No Lavandula angustifolia 'Hidcote'
14No Philadelphus 'Belle Etoile'
7No Skimmia japonica 'Rubella'
6No Philadelphus 'Belle Etoile'
9No Lavandula angustifolia 'Hidcote'
9No Skimmia japonica 'Rubella'
14No Skimmia japonica 'Rubella'
11No Sarcococca humilis
19No Viburnum opulus
13No Skimmia japonica 'Rubella'
7No Pittosporum tenuifol. 'Golf Ball'
6No Choisya 'Aztec Pearl'
7No Euonymus fortunei 'Emerald Gaiety'
8No Lonicera nitida 'Baggesen's Gold'
9No Hebe rakaiensis
7NoHebe rakaiensis
8No Carex testacea 'Old Gold'
9No Skimmia japonica 'Rubella'
9No Euonymus europaeus
9No Philadelphus 'Belle Etoile'
17No Hebe rakaiensis
9No Philadelphus 'Belle Etoile'
1No Acer campestre 'Streetwise'
6No Euonymus europaeus
10No Lavandula angustifolia 'Hidcote'
15No Skimmia japonica 'Rubella'
1No Amelanchier 'Ballerina'
10No Weigela 'Mont Blanc'
1No Acer campestre 'Streetwise'
1No Acer campestre 'Streetwise'
2No Carpinus betulus 'Frans Fontaine'
12No Carex testacea 'Old Gold'
11No Carex testacea 'Old Gold'
457No Narcissus 'Tete a Tete'
407No Narcissus 'Tete a Tete'
408No Narcissus 'Tete a Tete'
14No Hebe albicans 'Red Edge'
11No Chaenomeles superba
11No Genista lydia
10No Hebe rakaiensis
16No Skimmia japonica 'Rubella'
9No Choisya 'Aztec Pearl'
7No Viburnum burkwoodii 'Anne Russell'
106No Carpinus betulus
4No Sarcococca humilis
5No Skimmia japonica 'Rubella'
14No Skimmia japonica 'Rubella'
10No Escallonia 'Apple Blossom'
160No Carpinus betulus
3No Prunus sargentii 'Rancho'
4No Prunus sargentii 'Rancho'
10No Lavandula angustifolia 'Hidcote'
11No Philadelphus 'Belle Etoile'
1No Acer campestre 'Streetwise'
6
1
61 BRIDGE ROAD EAST (ISABEL HOSPICE)
VEHICLE REPAIR CENTRE
T
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W
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9No Philadelphus 'Belle Etoile'
13NoFuchsia 'Margaret'
6No Hebe rakaiensis
4No Lavandula angustifolia 'Hidcote'
8No Sarcococca humilis
12No Lavandula angustifolia 'Hidcote'
9No Lavandula angustifolia 'Hidcote'
14No Lavandula angustifolia 'Hidcote'
9No Hebe pinguifolia 'Pagei'
9No Hebe pinguifolia 'Pagei'
13No Viburnum burkwoodii 'Anne Russell'
11No Pittosporum tenuifol. 'Golf Ball'
16No Escallonia 'Apple Blossom'
7No Skimmia japonica 'Rubella'
4No Sarcococca humilis
8No Euonymus fortunei 'Emerald Gaiety'
8No Genista lydia
8No Philadelphus 'Belle Etoile'
10No Hebe albicans 'Red Edge'
10No Abelia grandiflora 'Francis Mason'
10No Genista lydia
11No Philadelphus 'Belle Etoile'
6No Clematis armandii 'Apple Blossom'
7No Pittosporum tenuifol. 'Golf Ball'
1No Acer campestre 'Streetwise'
2No Acer campestre 'Streetwise'
1No Carpinus betulus 'Frans Fontaine'
3No Carpinus betulus 'Frans Fontaine'
2No Sorbus aucuparia
15No Sarcococca humilis
15No Hebe rakaiensis
15NoEuonymus fortunei 'Emerald Gaiety'
3No Philadelphus 'Belle Etoile'
2No Lonicera nitida 'Baggesen's Gold'
13No Skimmia japonica 'Rubella'
P
E
P
P
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L
E
T
IN
L
E
T
9No Lonicera nitida 'Baggesen's Gold'
2No Prunus sargentii 'Rancho'
8No Hebe albicans 'Red Edge'
10No Skimmia japonica 'Rubella'
7No Euonymus fortunei 'Emerald Gaiety'
60No Ligustrum ovalifolium
5No Hebe rakaiensis
7No Chaenomeles superba
6No Hebe albicans 'Red Edge'
5No Skimmia japonica 'Rubella'
5No Sarcococca humilis
3No Euonymus fortunei 'Emerald Gaiety'
6No Fuchsia 'Margaret'
7No Hebe pinguifolia 'Pagei'
472No Buxus sempervirens 'Rotundifolia'
7No Genista lydia
6No Skimmia japonica 'Rubella'
4No Fuchsia 'Margaret'
4No Viburnum burkwoodii 'Anne Russell'
6No Hebe albicans 'Red Edge'
7No Elaeagnus ebbingei
7No Sarcococca humilis
8No Skimmia japonica 'Rubella'
8No Euonymus fortunei 'Emerald Gaiety'
7No Sarcococca humilis
7No Elaeagnus ebbingei
5No Skimmia japonica 'Rubella'
5No Euonymus fortunei 'Emerald Gaiety'
3No Chaenomeles superba
5No Sarcococca humilis
5No Elaeagnus ebbingei
6No Skimmia japonica 'Rubella'
7No Sarcococca humilis
7No Elaeagnus ebbingei
5No Skimmia japonica 'Rubella'
6No Euonymus fortunei 'Emerald Gaiety'
6No Chaenomeles superba
6No Euonymus fortunei 'Emerald Gaiety'
11No Sarcococca humilis
18No Genista lydia
11No Skimmia japonica 'Rubella'
17No Hebe albicans 'Red Edge'
16No Lonicera nitida 'Baggesen's Gold'
Dimension of tree pit to be at least
75mm greater then the rootball. The
depth of the pit shall be no deeper
than the existing rootball and
container depth
Root Rain Metro tree pit irrigation
system, or similar
Backfill material to comprise of soil
dug from excavated pits (if of
sufficient quality) or to be backfilled
with 600mm subsoil and 300mm of
topsoil, in line with BS3882:2015
Specification for topsoil
1m diameter of decorative bark
mulch to be applied to surface of tree
pit, to a depth of 75mm
Base of tree pit to remain
undisturbed unless there is evidence
of poor drainage, soil smearing or
panning in which case appropriate
rectification measures will be
required
Backfill material is be be applied in
layers 150mm in depth, ensuring that
the tree is held upright
The root flare of the newly planted
tree shall be clearly visible at the soil
surface and is not to be buried by
excess soil or mulch
Stakes to be requisite length,
pressure impregnated, debarked
softwood 100mm square or diameter,
driven into ground sufficient depth to
provide full support
Once tree has been positioned the
hessian and twine surrounding the
roots is to be loosened. Wire cages
are to be removed
Tree ties to be expandable rubber
with spacer block, fixed to stake with
heavy duty galvanised nails
Tree Pit Detail: Soft Landscape
Components as supplied from GreenBlue Urban or similar
Legend
Existing trees to be retained and
protected during construction
Proposed specimen shrub planting to
receive short angular staking on half
standards with expandable tree ties.
Irrigation tubing to root system of
Amelanchier and Juniperus specimens as
required
Proposed shrub planting to receive 75mm
bark mulch after planting operations
Proposed grass areas to receive good
quality amenity grass turves laid in line with
good horticultural practices
Proposed bulb planting within grassed
areas, to be planted to a depth 3x size of
the bulb in Autumn
Proposed climbing plants to be trained up
adjacent wall/ fence/pergola with
galvanised wires and hook set 250mm
apart with support canes removed prior to
planting
Proposed Buxus (box) hedge planting to
be planted in a single row at 300mm
centres. To be maintained at 0.6m height
Proposed tree planting within soft
landscape. See detail 2 on sheet xxx
Proposed Carpinus (hornbeam) hedge
planting to be planted in a double
staggered row 400mm apart and at
400mm centres in each row. To be
maintained at 1.2m height
1272No32/m²Grade 12/14Narcissus 'Tete a Tete'
No.DensitySpecificationSpecies Name
Bulbs
31No4/m²2LCarex testacea 'Old Gold'
No.DensitySpecificationPot SizeHeightSpecies Name
Herbaceous
6NoCountedSeveral Shoots :Caned5-7.5L80-100cmClematis armandii 'Apple Blossom'
No.DensitySpecificationPot SizeHeightSpecies Name
Climbers
10No4/m²Bushy5L40-60cmWeigela 'Mont Blanc'
19No4/m²Bushy5L40-60cmViburnum opulus
39No4/m²Bushy5L40-60cmViburnum burkwoodii 'Anne Russell'
212No4/m²Bushy5L40-60cmSkimmia japonica 'Rubella'
143No4/m²Bushy5L40-60cmSarcococca humilis
25No4/m²Bushy5L40-60cmPittosporum tenuifol. 'Golf Ball'
16No4/m²Bushy5L40-60cmPhotinia fraseri 'Little Red Robin'
157No4/m²Bushy5L40-60cmPhiladelphus 'Belle Etoile'
35No4/m²Bushy5L40-60cmLonicera nitida 'Baggesen's Gold'
320No0.3Ctr Double Staggered at 0.3m offsetBranched :C5-7.5L60-80cmLigustrum ovalifolium
107No4/m²Bushy :C5L30-40cmLavandula angustifolia 'Hidcote'
69No4/m²Bushy5L40-60cmHebe rakaiensis
25No4/m²Bushy :C5L30-40cmHebe pinguifolia 'Pagei'
100No4/m²Bushy5L40-60cmHebe albicans 'Red Edge'
100No4/m²Bushy :C5-7.5L40-60cmGenista lydia
35No4/m²Bushy5-7.5L40-60cmFuchsia 'Margaret'
116No4/m²Bushy5L30-40cmEuonymus fortunei 'Emerald Gaiety'
15No4/m²Bushy5L40-60cmEuonymus europaeus
43No4/m²Bushy5L40-60cmEscallonia 'Apple Blossom'
20No0.4Ctr Double Staggered at 0.4m offsetBranched :C :To be planted and maintained as a hedge5-7.5L60-80cmElaeagnus ebbingei
40No4/m²Branched :C :To be planted and maintained as a hedge5-7.5L60-80cmElaeagnus ebbingei
33No4/m²Bushy5L40-60cmChoisya 'Aztec Pearl'
69No4/m²Branched5L40-60cmChaenomeles superba
464No0.5Ctr Double Staggered at 0.3m offsetBranched :C5-7.5L60-80cmCarpinus betulus
729No0.3Ctr Double Staggered at 0.3m offsetBushy :C :Planted and maintained as a hedge5-7.5L30-40cmBuxus sempervirens 'Rotundifolia'
19No4/m²Bushy5L40-60cmAucuba japonica 'Rozannie'
1NoCountedBushy :C25-35L175-200cmAmelanchier 'Ballerina'
10No4/m²Bushy5L40-60cmAbelia grandiflora 'Francis Mason'
No.DensitySpecificationPot SizeHeightSpecies Name
Shrubs
3NoSemi-mature :Clear Stem min. 200 :RBCountedmin. 450cm20-25cmAcer campestre 'Streetwise'
4NoSemi-mature :Clear Stem min. 200 :RBCountedmin. 450cm20-25cmCarpinus betulus 'Frans Fontaine'
2NoExtra Heavy Standard :Clear Stem min. 200 :RBCounted425-600cm14-16cmCarpinus betulus 'Frans Fontaine'
2NoExtra Heavy Standard :Clear Stem min. 200 :RBCounted425-600cm14-16cmSorbus aucuparia
4NoHeavy Standard :Clear Stem min. 200 :RBCounted425-600cm14-16cmAcer campestre 'Streetwise'
9NoHeavy Standard :Clear Stem min. 200 :RBCounted350-425cm12-14cmPrunus sargentii 'Rancho'
No.SpecificationDensityHeightGirthSpecies Name
Trees
Planting Schedule
Proposed 1.2m high bow top fencing in
black, supplied by Jackson Fencing or
similar
Proposed 1.8m high close boarded fencing,
supplied by Jackson Fencing or similar
2No 3S Schwegler Starling Nest Box
2No 1SP Schwegler Sparrow Terrace
1No 2H Schwegler Robin Box
2No HH7 Hedgehog Hogilo Box
2No Habibat integrated Bat Boxes
Proposed 0.8m high close bow top fencing
in black, supplied by Jackson Fencing or
similar
Proposed wildflower and grass areas to
receive seed mix WRG4 Neutral Soils at a
sowing rate of 5g/m² on prepared ground in
line with good horticultural practices
SPECIFICATION
All works generally, to comply with the written Soft
Landscape Specification.
NOTE: DO NOT SCALE FROM DRAWING
Date Details Drawn
May 2017
HCS
51 Bridge Road East,
Welwyn Garden City
Landscape Proposals
1:200@A1
TWNT 20946 11E
ALK
Rev
Taylor Wimpey North Thames
AC
D
drawn: checked:
drawing no:
scale:
drawing:
date:
scheme:
Copyright of ACD Environmental Ltd. All rights described in
Chapter IV of the Copyright, Designs and Patents Act 1988
have been generally asserted: 2011. Copyright of this plan
remains with ACD until all fees have been paid in full.
client:
HEAD OFFICE
Rodbourne Rail Business Centre, Grange Lane,
Malmesbury, SN16 0ES
Tel: 01666 825646
Courtyard House, Mill Lane, Godalming, GU7 1EY
Tel: 01483 425714
Suite 6, Crescent House, Yonge Close, Eastleigh, SO50 9SX
Tel: 02382 026300
9 Brownlow Road, Cambridge, CB4 3NG
Tel: 07825 868654
email: [email protected]
www.acdenvironmental.co.uk
ENVIRONMENTAL
06.09.17 Layout revision ALKA
16.01.18 Layout revision ALKB
08.08.18 Layout revision and eco enhancements HCSC
13.08.18 Layout revision (external works) HCSD
17.08.18 Client Comments HCSE
Head Office
Rodbourne Rail Business Centre Grange Lane Malmesbury SN16 0ES
Tel: 01666 825646
Surrey Office Courtyard House
Mill Lane Godalming GU7 1EY
Tel: 01483 425714
Hampshire Office Suite 6
Crescent House Yonge Close
Eastleigh SO50 9SX
Tel: 02382 026300
Cambridgeshire Office 9 Brownlow Road
Cambridge CB4 3NG
Tel: 07825 868654
Email: [email protected] Website: www.acdenvironmental.co.uk
ECOLOGICAL SURVEYS * PROTECTED SPECIES LICENSING * MITIGATION * IMPACT ASSESSMENT ARBORICULTURAL SITE MONITORING AND SUPERVISION * ARCHAEOLOGY
LANDSCAPE & VISUAL IMPACT ASSESSMENT * LANDSCAPE AUDIT * PROJECT MANAGEMENT EXPERT WITNESS* LANDSCAPE DESIGN & PLANNING LANDSCAPE MANAGEMENT